[zgrssd]

Originally Posted by Xrystal As far as I know there is no prototyping requirement in lua. You simply set up the function you want to call or you call a function that already exists.

Now I get it. I thought we first had to "add" our custom event before others could register for it. But that was wrong.
Any handlers regsitered to the callback manager are raised by the call of:

CALLBACK_MANAGER:FireCallbacks("QuestTrackerTrackingStateChanged", self, true, TRACK_TYPE_QUEST, 0)

And this was registering one handler

local function OnTrackStateChanged(questTracker, tracked, trackType, arg1, arg2)
    if tracked then
        d("A quest was tracked")
    else
        d("A quest was untracked")
    end
end
 
CALLBACK_MANAGER:RegisterCallback("QuestTrackerTrackingStateChanged", OnTrackStateChanged)

I think I am going to rework that FAQ part for better understandability, as I jsut rewrote the Saved Var part.